Axially chiral materials exhibiting blue-emissive ultralong organic phosphorescence and intense circularly polarized luminescence
Source abstract
Abstract
本文报道了一类兼具超长有机磷光(UOP)和强圆偏振发光(CPL)性质的蓝光轴手性材料. 这类材料不仅具有极小的单重态(S1)-三重态(T1)能隙差(ΔEST, 0.03 eV), 能够极大地促进系间窜越过程以产生更多的三重态激子, 而且还具有超长的磷光衰减寿命(5.5 s). 因此, 这类材料在77 K下的2-MeTHF稀溶液中显示长达60 s的亮蓝色余辉. 我们进一步提出了“激子沙漏”模型来描述内部的光物理过程和解释产生超长余辉的原因. 此外, 由于刚性的轴手性骨架, 这类UOP材料还表现出强的CPL活性, 尤其是将它们用作液晶材料的手性诱导剂时, 能够获得0.34的glum值. 本工作对于进一步设计兼具UOP和强CPL性质的新型纯有机分子材料具有重要的指导意义.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence and Fluorescent Materials · Synthesis and Properties of Aromatic Compounds
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (62)
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